【Groovy】MOP 元对象协议与元编程 ( Groovy 类内部和外部分别获取 metaClass | 分析获取 metaClass 操作的字节码 | HandleMetaClass 注入方法 )

class Student {
    def methodMissing(String name, def args) {
        println metaClass
        return null
    }
}
def student = new Student()
println student.metaClass
student.hello()

org.codehaus.groovy.runtime.HandleMetaClass@732d0d24[groovy.lang.MetaClassImpl@732d0d24[class Student]]
groovy.lang.MetaClassImpl@732d0d24[class Student]

public class Groovy extends Script {
    public Groovy() {
        CallSite[] var1 = $getCallSiteArray();
        super();
    }
    public Groovy(Binding context) {
        CallSite[] var2 = $getCallSiteArray();
        super(context);
    }
    public static void main(String... args) {
        CallSite[] var1 = $getCallSiteArray();
        var1[0].call(InvokerHelper.class, Groovy.class, args);
    }
    public Object run() {
        CallSite[] var1 = $getCallSiteArray();
        Object student = var1[1].callConstructor(Student.class);
        var1[2].callCurrent(this, var1[3].callGetProperty(student));
        return var1[4].call(student);
    }
}

public class Student implements GroovyObject {
    @Generated
    public Student() {
        CallSite[] var1 = $getCallSiteArray();
        super();
        MetaClass var2 = this.$getStaticMetaClass();
        this.metaClass = var2;
    }
    public Object methodMissing(String name, Object args) {
        CallSite[] var3 = $getCallSiteArray();
        var3[0].callCurrent(this, this.metaClass);
        return null;
    }
    @Generated
    @Internal
    public MetaClass getMetaClass() {
        MetaClass var10000 = this.metaClass;
        if (var10000 != null) {
            return var10000;
        } else {
            this.metaClass = this.$getStaticMetaClass();
            return this.metaClass;
        }
    }
    @Generated
    @Internal
    public void setMetaClass(MetaClass var1) {
        this.metaClass = var1;
    }
}

var3[0].callCurrent(this, this.metaClass);

MetaClass var2 = this.$getStaticMetaClass();
        this.metaClass = var2;

var1[2].callCurrent(this, var1[3].callGetProperty(student));